Qa42a

[cub108]

hello all,
1. I have a 108 and 109 with a 12 horse in it. will the QA42A work on both tractors?
2. I saw it before and cannot find it for the life of me an article for rebuilding the snowthrower. Can someone send me a link for checking the u-joints, setting the tension on the chain, the fluid that is installed in the gear box, and finally the small sprocket end play, how to take it apart and the correct play it is suppose to have Will I need to shim the sprocket shaft due to play? How do I check the bearings for the small sprocket?
thanks for your help.

Here's a link to the manual for the thrower, should help you out. Any cub with a serial # above 400,000 will work with a qa36a, qa42a thrower.
http://ccmanuals.info/pdf/QA%2036A%2...s%20Manual.pdf

[Cubcrazy]

Yes, it will work on both.

[Matt G.]

It will work on both, but you want it on the 109. Snowthrowers on gear drive tractors are a pain. Plus you need a creeper. You also need the extra 2 hp your 109 w/ 12 hp transplant has.

[cub108]

thanks,
the 108 does have a creeper.

1. i saw it before and cannot find it for the life of me an article for rebuilding the snowthrower.
can someone send me a link for checking the u-joints, setting the tension on the chain, the fluid that is installed in the gear box, and finally the small sprocket end play, how to take it apart and the correct play it is suppost to have.
will i need to shim the sprocket shaft due to play?
how do i check the bearings for the small sproket?
thanks for your help.

[cub108]

anyone on the rebuilding of the snowthrower.

[ol'George]

Originally Posted by cub108

thanks,
the 108 does have a creeper.

1. i saw it before and cannot find it for the life of me an article for rebuilding the snowthrower.
can someone send me a link for checking the u-joints, setting the tension on the chain, the fluid that is installed in the gear box, and finally the small sprocket end play, how to take it apart and the correct play it is suppost to have.
will i need to shim the sprocket shaft due to play?
how do i check the bearings for the small sproket?
thanks for your help.

The gear box does well with EP90W-- diff oil. I have also used chassis grease in the gear box's, packing them full.
Also check for broken teeth in the gear box/tightness of the ball bearings/and shaft seals
The U joints should have little or no play, but swivel free just like a car or truck driveshaft.
To dissemble the jackshaft:
Knock out the coiled pin in the small sprocket, then the shaft is free to slide out of the needle bearings.
the shaft should show very little wear in the bearing and sprocket area, if a lot, replace the shaft. if the bearings are bad, they will need replacing also.
The keyway should be tight as well in the u joint.
You can shim the sprocket with a washer to remove the end play, being careful to allow room for the chain so it doesn’t chew into the support the needle bearing is in, the bracket/support is NLA.
Set the chain tightness so it is just barely snug, checked @ it tightest point by rotating the sprocket/shaft by hand ----much like any roller chain.
It is adjusted by the 2 bolts @ the bottom of the bracket, seems like they are 3/4" hex head with lock nuts.
It is important to adjust them the same so both carry the load.

[cub108]

sweet, thanks